From the 20th century to the present, Russia has been the primary beneficiary of American espionage. Here's a look at the most memorable offenders, from Aldrich Ames of the CIA to Robert Hanssen of the FBI.

Shortly before dawn on Saturday, rescue workers began freeing vehicles from under the collapsed concrete bridge at Florida International University, a milestone in the two-day, around-the-clock extraction effort. The second vehicle emerged around 7 a.m., almost entirely flattened.

Shortly before dawn on Saturday, rescue workers began freeing vehicles from under the collapsed concrete bridge at Florida International University, a milestone in the two-day, around-the-clock extraction effort. The first vehicle -- a crushed Jeep -- emerged after 6 a.m.

FILE from March 10, 2018: Early morning view of the main span of the FIU-Sweetwater UniversityCity Pedestrian Bridge as it was lifted from its temporary supports, rotated 90 degrees across an eight-lane thoroughfare and lowered into its permanent position over SW 8 Street. The 174-foot, 950-ton section of the bridge was built adjacent to Southwest Eight Street using Accelerated Bridge Construction (ABC) methods, which are being advanced at FIU's Accelerated Bridge Construction University Transportation Center (ABC-UTC). The bridge was designed by FIGG Bridge Engineers and built by MCM. Barnhart Crane and Rigging operated the Self-Propelled Modular Transporters that placed the bridge on its permanent supports.

Florida International University president Mark Rosenberg expressed condolences on March 16, after a newly built pedestrian bridge collapsed at the university the previous day. Six people were confirmed dead and nine people were injured.